Struggling in this cl! Advice anyone?

I'm a freshman in hs. I'm in a physics cl. For the 1st half of the year, we had this really nice, younger guy subbing for us. Admittedly, he was a pretty easy grader, and I got As in his cl. Now, the old teacher has come back. He's an older guy, really nice, but I'm now struggling in the cl. His grading techniques are way different then the other guys. The sub used to post helpful powerpoints and notes, our teacher just drones on in cl and frankly, I can't understand a word he says sometimes. Plus, all we do is take quizes, he's totally cut back on lab work which always really helped me! I feel bad, because he's a really nice teacher, but I've just gotten so confused in physics. I've gone after cl to ask him to clarify what he sad, but it really just ends up confusing me more. My parents both SUCK at physics, btw. Any advice?